Daikin VRVIII-S, Руководство по обслуживанию

Страница: 240 / 266

SiBE34-703 Method of Replacing the Inverter’s Power Transistors Modules
Appendix 229
Power module checking
When using the digital type of multiple tester, make measurement in diode check mode.
*There needs to be none of each value variation.
The following abnormalities are also doubted besides the PC board abnormality.
1
Faulty compressor (ground fault, ground leakage)
1
Faulty fan motor (ground leakage)
Tester terminal Criterion Remark
+ -
C+ U Not less than 0.3V
(including
∞
)*
It may take time to
determine the voltage
due to capacitor
charge or else.
V
W
U C- Not less than 0.3V
(including
∞
)*
V
W
U
C+ 0.3 to 0.7V
(including
∞
)*
V
W
C-
U 0.3 to 0.7V
(including
∞
)*
V
W